Can I use ASM to mirror Oracle data in an extended RAC environment?
This support is for 10gR2 onwards and has the following limitations:1. As in any extended RAC environments, the additional latency induced by distance will affect I/O and cache fusion performance. This effect will vary by distance and the customer is responsible for ensuring that the impact attained in their environment is acceptable for their application.2. OCR must be mirrored across both sites using Oracle provided mechanisms.3. Voting Disk redundancy must exists across both sites, and at a 3rd site to act as an arbitrage. This third site may be via a WAN.4. Storage at each site much be setup as seperate failure groups and use ASM mirroring, to ensure at least one copy of the data at each site.5. Customer must have a seperate and dedicated test cluster also in an extended configuration setup using the same software and hardware components (can be fewer or smaller nodes).6. Customer must be aware that in 10gR2 ASM does not provide partial resilvering. Should a loss of connectivity be
